/* 
 * Quechua - the lightweight data mining framework
 *
 * Copyright (C) 2012 Marek Denis <quechua@octogan.net>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef INTERFACE_CHANNEL
#define INTERFACE_CHANNEL

#include "interface-common.h"
#include "workflow.h"
class Workflow;

class Channel {
 public:
    Channel();
    virtual ~Channel();
    
    virtual bool prepare(); 
    virtual bool start();
    virtual bool stop();
    virtual bool reset();
 
    virtual bool notify(); // maybe use some void* as argument? 
 
    virtual bool record(Workflow* component); 
    virtual bool unrecord(Workflow*  component); 
    virtual bool load_misc_conf(const setting_t& misc);
 
    Internal* const internal;
 protected:
    workflows_list workflows;
    void init();
    virtual void notify_workflows(DataPack* data_chunk);
};

typedef Channel* (*load_channel_ptr)();
typedef void     (*destroy_channel_ptr)(Channel*);

// definition of function pointer for loading Channel instance from shared module
typedef Channel* (*load_channel_ptr)();
typedef void     (*destroy_channel_ptr)(Channel*);
typedef std::map<string_t,Channel*> channels_map;
typedef channels_map::iterator channels_map_it;

#endif
